The Tucson (SSN 770) is the second ship of the U.S. Navy to bear the name of this Arizona city. She is the 20th of the Los Angeles-Improved class attack submarine to be built. Her construction began on June 10, 1988, and her keel was laid down on September 20, 1991. She was christened on March 19, 1994, by Ms. Diane C. Kent, wife of The Honorable Gerald A. Cann, former Assistant Secretary of the Navy for Research, Development and Acquisition.

The Tucson was supposed to be commissioned on August 18, 1995, however, Hurricane Felix threatened the Virginia coast, and the U.S. Navy decided to sortie the fleet, to prevent damage to ships in port if the hurricane made landfall. She was the last ship to leave port, in case the prediction for landfall changed. As it turned out, the hurricane never did make landfall, but the Tucson was at sea on 18th. Upon returning to port, the commissioning ceremony was quickly rescheduled for Sept. 19. The CO, Cmdr. Duane M. Baker, declared that for the next two hours, it was officially August 18th.

July 9, 2003 The U.S. Navy’s new Tomahawk cruise missile, the Block IV, or Tactical Tomahawk, was launched from the nuclear-powered submarine SSN 770 in the waters of the Naval Air Systems Command (NAVAIR) sea test range off the coast of southern California. The event marked the first launch of the Tactical Tomahawk from an operational submarine launch platform. The missile will become operational in the middle of 2004.

July 20, The Tactical Tomahawk, configured with a live warhead, was launched from USS Tucson in the waters of the Naval Air Systems Command (NAVAIR) sea test range off the coast of southern California. The event marked the missile’s first live warhead shot from a submarine and the second launch of the Tactical Tomahawk from the Tucson using the new submarine Combat Control System (CCS MK 2).

May 19, 2004 USS Tucson departed homeport for a scheduled western Pacific deployment; Returned home on Nov. 19.

October 11, 2005 The Los Angeles-Improved class attack submarine departed home to participate in a Combined Training Unit Exercise (COMPTUEX) off the coast of southern California. For approximately three weeks, the crew will conduct various Anti-Submarine Warfare (ASW), and Intelligence, Surveillance, and Reconnaissance (ISR) exercises as a part of the USS Ronald Reagan (CVN 76) Carrier Strike Group.

March 21, 2006 USS Tucson departed Pearl Harbor for a western Pacific deployment.

March 30, SSN 770 arrived in Yokosuka, Japan, for a scheduled port visit.

September 21, USS Tucson, commanded by Cmdr. Jimmy Pitts, returned to Pearl Harbor after six-month deployment. She visited Sasebo and Yokosuka, Japan; Saipan and Guam. In June, the ship participated in Exercise Valiant Shield 2006 near Guam, providing anti-submarine warfare training to three aircraft carrier strike groups. It also participated in a bilateral exercise with the Royal Australian Navy, submarine HMAS Farncomb.

September 29, Cmdr. Paul D. Spear relieved Cmdr. James E. Pitts as CO of USS Tucson during a change-of-command ceremony held aboard the sub at Pearl Harbor Naval Station.

January 25, 2007 The Tucson departed homeport for a Depot Modernization Period in Norfolk Naval Shipyard at Portsmouth, Virginia.

December 15, 2008 USS Tucson returned to Pearl Harbor after completing a DMP in NNSY.

February 27, 2009 Cmdr. Gary W. Pinkerton relieved Cmdr. Paul D. Spear as commanding officer of the Tucson.

April 8, 2010 USS Tucson departed Joint Base Pearl Harbor-Hickam for a scheduled western Pacific deployment.

April 27, The Tucson moored at Berth 13S, Fleet Activities Yokosuka, Japan, for a three-day port call. Inport Yokosuka again from May 24-2?.

July 13, The nuclear-powered submarine moored at Akasaki Pier in Fleet Activities Sasebo, Japan, for a week-long upkeep. Brief stop in Sasebo on July 23.

July 26, The Tucson is currently participating in a combined alliance maritime and air readiness exercise Invincible Spirit, in the seas east of the Korean peninsula from July 25-28, along with the George Washington (CVN 73) CSG.

October 8, USS Tucson returned to homeport after a six-month underway period in the U.S. 7th Fleet AoR.

March 25, 2011 Cmdr. James E. O'Harrah relieved Cmdr. Gary W. Pinkerton as CO of SSN 770 during a change-of-command ceremony at Pearl Harbor.

December 14, USS Tucson departed Pearl Harbor for a scheduled western Pacific deployment.

February 6, The Tucson made a brief stop at White Beach, Okinawa, for personnel transfer. Upkeep in Sasebo, Japan, from Feb. 10-17; Brief stops in Sasebo on Feb. 21, 24 and 27th.

March 30, SSN 770 pulled into Apra Harbor, Guam, for a brief port call.

April 14, The Los Angeles-Improved class attack submarine is currently participating in a bi-lateral exercise Malabar 2012, in the Bay of Bengal.

May 31, USS Tucson moored outboard the USS Emory S. Land (AS 39) in Apra Harbor, Guam, for a routine port call.

June 14, USS Tucson returned to Joint Base Pearl Harbor-Hickam after a six-month deployment. The ship also made port call to Saipan.

September 5, 2013 USS Tucson departed homeport for a scheduled western Pacific deployment.

November 12, SSN 770 moored at Berth 1 in Busan Naval Base, Republic of Korea, for a routine port call. Brief stop at Sasebo, Japan, on Nov. 22; Inport Sasebo again from Nov. 26- Dec. 4; Brief stop at Okinawa for personnel transfer on Jan. 3.

January 10, 2014 The Tucson moored outboard the USS City of Corpus Christi (SSN 705) at Berth 13, Fleet Activities Yokosuka, Japan, for a five-day port call. Inport Changi Naval Base in Singapore from Jan. 24-28; Brief stop at Okinawa on Feb. 10 and 17th.

March 7, USS Tucson returned to Pearl Harbor after a six-month deployment.

April 10, Cmdr. Michael C. Beckette relieved Cmdr. James E. O'Harrah as CO of the Tucson during a change-of-command ceremony on board the sub at Joint Base Pearl Harbor-Hickam.

February 4, 2015 The Tucson returned to homeport from local operations for a brief stop to conduct personnel transfer; Underway again on Feb. 25.

June 12, The Los Angeles-Improved class attack submarine returned to Pearl Harbor after underway for routine training.?

November 1?, USS Tucson departed Pearl Harbor for a scheduled western Pacific deployment.

December 6, The Tucson moored outboard the USS Emory S. Land at Alava Pier in Subic Bay, Philippines, for a three-day Fleet Maintenance Availability (FMAV).

January 21, 2016 USS Tucson moored at Berth 5, Changi Naval Base in Singapore for a week-long port visit.

February 8, SSN 770 moored at Akasaki Pier in Fleet Activities Sasebo, Japan, for a five-day port call.

April 6, The Tucson moored at Somo Do Pier 22 on Chinhae Naval Base, Republic of Korea, for a four-day port visit after supporting annual joint exercise Foal Eagle; Transited the Korean Strait southbound on April 16; Inport Sasebo again from April 17-21; Transited the Osumi Strait eastbound on April 22.

May 22, The Tucson made a brief stop in Pearl Harbor to embark Nuclear Propulsion Examination Board (NPEB) personnel for Operational Reactor Safeguards Examination (ORSE).

May 24, USS Tucson moored at Pier S9 on Joint Base Pearl Harbor-Hickam following a six-month deployment.

July 8, The Tucson departed Pearl Harbor to participate in at-sea phase of a biennial multinational exercise Rim of the Pacific (RIMPAC) 2016; Brief stop in Pearl Harbor on July 10, July 19 and Aug. 3; Moored at Wharf Y2 on Aug. 5.

August 30, Cmdr. Chad A. Hardt relieved Cmdr. Michael C. Beckette as CO of the Tucson during a change-of-command ceremony on board the sub.

November 29, USS Tucson departed Wharf Y2 for sea trials following a four-month Selected Restricted Availability (SRA); Brief stop in Pearl Harbor for personnel transfer on Dec. 5 and 7th.

January 13, 2017 The Tucson departed Pier S8 for routine operations; Brief stop in Pearl Harbor on Jan. 21; Returned home on Jan. 23; Moored at Wharf W5, Naval Magazine Lualualei for ammo onload from Jan. 25-27; Moored at Pier S8 on Jan. 27; Underway again on Jan. 31; Brief stop in Pearl Harbor on Feb. 1; Moored at Wharf S10 for a brief stop on Feb. 2; Brief stop in Pearl Harbor on Feb. 7, 12 and 17th; Moored at Wharf S11 for a brief stop on Feb. 23.

February 28, SSN 770 made a brief stop in Pearl Harbor for personnel transfer; Moored at Wharf S11 on March 2; Underway again on April 25; Brief stop in Pearl Harbor on April 28 and May 1; Moored at Wharf Y3B on May 5.

June 5, USS Tucson moored at Wharf W5, Naval Magazine Lualualei for a three-day ammo onload; Underway again on June 13; Brief stop in Pearl Harbor on June 16 and June 20; Moored at Wharf Y3B on June 23; Underway again from July 1-?.

September 1, The Tucson moved from Pier S8 to Wharf S10 on Joint Base Pearl Harbor-Hickam.

September 5, USS Tucson departed Pearl Harbor for a scheduled western Pacific deployment.

September 19, The Tucson made a brief stop off Fleet Activities Yokosuka, Japan, for personnel transfer; Moored at Somo Do Pier 22 on Chinhae Naval Base, ROK, from Oct. 7-11.

December 1, USS Tucson moored at Pier 13S in Fleet Activities Yokosuka for a scheduled port visit; Moored outboard the USS Texas (SSN 775) at Berth 13S on Dec. 6; Departed Yokosuka on Dec. 8; Brief stop off White Beach, Okinawa, on Dec. 19; Brief stop off Yokosuka on Dec. 23.

December 28, SSN 770 pulled into Apra Harbor, Guam, for a liberty port visit to celebrate the New Year's Eve.

March 7, 2018 USS Tucson moored at Wharf S1B on Joint Base Pearl Harbor-Hickam following a six-month deployment.

April 16, The Tucson moored at Wharf W5, Naval Magazine Lualualei to offload ammunition; Moored at Wharf S21A on April 20; Underway for routine operations from April 23-27; Moored at Wharf W5 again for a brief stop to offload ammo before moored at Wharf S21B on May 18; Underway for sea trials on Aug. 2.

February ?, 2019 USS Tucson departed Pearl Harbor for a surge western Pacific deployment.

May 8, The Tucson made a brief stop off Sasebo, Japan, for personnel transfer; Moored at Akasaki Pier in Fleet Activities Sasebo from May 11-16; Moored at Pier 13S on Fleet Activities Yokosuka from May 27-28; Brief stop off Sasebo on June 7.

September 18, USS Tucson moored at Wharf S10 on Joint Base Pearl Harbor-Hickam following an extended seven-month deployment.

September 20, Cmdr. Douglas Pratt relieved Cmdr. Chad A. Hardt as CO of the Tucson during a change-of-command ceremony on board the sub.

January 6, 2020 USS Tucson moored at Wharf W5, Naval Magazine Lualualei for ammo offload; Moored at Wharf S10 on Jan. 13; Moored at Wharf W4 on Jan. 27; Moored at Pier S9 on Jan. 31.

February 28, SSN 770 is currently moored at Wharf Y3A on Joint Base Pearl Harbor-Hickam.

February 11, 2021 USS Tucson moved, just after midnight, from Wharf B3 to Dry Dock #3 on Pearl Harbor Naval Shipyard for a scheduled Engineered Overhaul (EOH).

April 19, 2022 Cmdr. Adam Matthews relieved Cmdr. Douglas Pratt as CO of the Tucson during a change-of-command ceremony at the USS Bowfin Museum and Submarine Park in Pearl Harbor.

November 21, USS Tucson undocked and moored at Wharf B2 on Pearl Harbor Naval Shipyard; Underway for sea trials on August 3, 2023; Moored at Pier S9 on Aug. 7; Underway again from Aug. ?-18 and Aug. 28; Moored at Wharf W5 for ammo onload on Sept. 6; Moved to Wharf Y2 on Sept. 7; Underway again on Sept. ?.

October 5, The Tucson made a brief stop in Pearl Harbor for personnel transfer; Brief stop in Pearl Harbor again on Oct. 16; Moored at Pier A on Canadian Forces Base (CFB) Esquimalt from Nov. 6-9; Brief stop in Pearl Harbor on Nov. 28.?

January 2, 2024 USS Tucson made a brief stop in Pearl Harbor for personnel transfer; Moored at Wharf S1A on Feb. 23; Moved to Wharf W5 for ammo onload on Feb. 26; Underway again on Feb. 2?; Brief stop in Pearl Harbor on March 4 and 6th; Returned home on March 15; Underway again from April 1-10 and April 1?.

April 26, The Tucson made a brief stop in Pearl Harbor for personnel transfer; Moored at Pier S9 on May 4; Underway again on May 10.

July 18, USS Tucson recently moored at Berth 1, Romeo Wharf in Apra Harbor, Guam, for a scheduled port call.

December 9, The Tucson moored at Pier S8 on Joint Base Pearl Harbor-Hickam for a brief stop; Brief stop in Pearl Harbor for personnel transfer on Dec. 12.